/*===========================================================================*\
*                                                                           *
*                               OpenMesh                                    *
*      Copyright (C) 2001-2005 by Computer Graphics Group, RWTH Aachen      *
*                           www.openmesh.org                                *
*                                                                           *
*---------------------------------------------------------------------------* 
*                                                                           *
*                                License                                    *
*                                                                           *
*  This library is free software; you can redistribute it and/or modify it  *
*  under the terms of the GNU Library General Public License as published   *
*  by the Free Software Foundation, version 2.                              *
*                                                                           *
*  This library is distributed in the hope that it will be useful, but      *
*  WITHOUT ANY WARRANTY; without even the implied warranty of               *
*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU        *
*  Library General Public License for more details.                         *
*                                                                           *
*  You should have received a copy of the GNU Library General Public        *
*  License along with this library; if not, write to the Free Software      *
*  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.                *
*                                                                           *
\*===========================================================================*/


//=============================================================================
//
//  Implements the baseclass for IOManager writer modules
//
//=============================================================================


#ifndef __BASEWRITER_HH__
#define __BASEWRITER_HH__


//=== INCLUDES ================================================================


// STD C++
#include <iostream>
#include <string>

// OpenMesh
#include <Core/System/config.hh>
#include <Core/IO/Options.hh>
#include <Core/IO/exporter/BaseExporter.hh>


//== NAMESPACES ===============================================================


namespace OpenMesh {
	namespace IO {


		//=== IMPLEMENTATION ==========================================================


		/**
		Base class for all writer modules. The module should register itself at
		the IOManager by calling the register_module function.
		*/
		class BaseWriter
		{
		public:

			typedef unsigned int Option;

			/// Destructor
			virtual ~BaseWriter() {}

			/// Return short description of the supported file format.
			virtual std::string get_description() const = 0;

			/// Return file format's extension.
			virtual std::string get_extensions() const = 0;

			/// Returns true if writer can parse _filename (checks extension)
			virtual bool can_u_write(const std::string& _filename) const;

			/// Write to file _filename. Data source specified by BaseExporter _be.
			virtual bool write(const std::string& _filename, 
				BaseExporter& _be,
				Options _opt) const = 0;

			/// Returns expected size of file if binary format is supported else 0.
			virtual size_t binary_size(BaseExporter&, Options) const { return 0; }



		protected:

			bool check(BaseExporter& _be, Options _opt) const
			{
				return (_opt.check(Options::VertexNormal ) <= _be.has_vertex_normals())
					&&  (_opt.check(Options::VertexTexCoord)<= _be.has_vertex_texcoords())
					&&  (_opt.check(Options::VertexColor)   <= _be.has_vertex_colors())
					&&  (_opt.check(Options::FaceNormal)    <= _be.has_face_normals())
					&&  (_opt.check(Options::FaceColor)     <= _be.has_face_colors());
			}
		};


		//=============================================================================
	} // namespace IO
} // namespace OpenMesh
//=============================================================================
#endif
//=============================================================================
